| /* |
| ** |
| ** Copyright 2006, The Android Open Source Project |
| ** |
| ** Licensed under the Apache License, Version 2.0 (the "License"); |
| ** you may not use this file except in compliance with the License. |
| ** You may obtain a copy of the License at |
| ** |
| ** http://www.apache.org/licenses/LICENSE-2.0 |
| ** |
| ** Unless required by applicable law or agreed to in writing, software |
| ** distributed under the License is distributed on an "AS IS" BASIS, |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ** See the License for the specific language governing permissions and |
| ** limitations under the License. |
| */ |
| |
| #define LOG_TAG "9patch" |
| #define LOG_NDEBUG 1 |
| |
| #include <androidfw/ResourceTypes.h> |
| #include <utils/Log.h> |
| |
| #include <Caches.h> |
| |
| #include "SkCanvas.h" |
| #include "SkRegion.h" |
| #include "GraphicsJNI.h" |
| |
| #include "JNIHelp.h" |
| |
| extern void NinePatch_Draw(SkCanvas* canvas, const SkRect& bounds, const SkBitmap& bitmap, |
| const android::Res_png_9patch& chunk, const SkPaint* paint, SkRegion** outRegion); |
| |
| using namespace android; |
| |
| /** |
| * IMPORTANT NOTE: 9patch chunks can be manipuated either as an array of bytes |
| * or as a Res_png_9patch instance. It is important to note that the size of the |
| * array required to hold a 9patch chunk is greater than sizeof(Res_png_9patch). |
| * The code below manipulates chunks as Res_png_9patch* types to draw and as |
| * int8_t* to allocate and free the backing storage. |
| */ |
| |
| class SkNinePatchGlue { |
| public: |
| static jboolean isNinePatchChunk(JNIEnv* env, jobject, jbyteArray obj) { |
| if (NULL == obj) { |
| return false; |
| } |
| if (env->GetArrayLength(obj) < (int)sizeof(Res_png_9patch)) { |
| return false; |
| } |
| const jbyte* array = env->GetByteArrayElements(obj, 0); |
| if (array != NULL) { |
| const Res_png_9patch* chunk = reinterpret_cast<const Res_png_9patch*>(array); |
| int8_t wasDeserialized = chunk->wasDeserialized; |
| env->ReleaseByteArrayElements(obj, const_cast<jbyte*>(array), JNI_ABORT); |
| return wasDeserialized != -1; |
| } |
| return false; |
| } |
| |
| static int8_t* validateNinePatchChunk(JNIEnv* env, jobject, jint, jbyteArray obj) { |
| size_t chunkSize = env->GetArrayLength(obj); |
| if (chunkSize < (int) (sizeof(Res_png_9patch))) { |
| jniThrowRuntimeException(env, "Array too small for chunk."); |
| return NULL; |
| } |
| |
| int8_t* storage = new int8_t[chunkSize]; |
| // This call copies the content of the jbyteArray |
| env->GetByteArrayRegion(obj, 0, chunkSize, reinterpret_cast<jbyte*>(storage)); |
| // Deserialize in place, return the array we just allocated |
| return (int8_t*) Res_png_9patch::deserialize(storage); |
| } |
| |
| static void finalize(JNIEnv* env, jobject, int8_t* patch) { |
| #ifdef USE_OPENGL_RENDERER |
| if (android::uirenderer::Caches::hasInstance()) { |
| Res_png_9patch* p = (Res_png_9patch*) patch; |
| android::uirenderer::Caches::getInstance().resourceCache.destructor(p); |
| return; |
| } |
| #endif // USE_OPENGL_RENDERER |
| delete[] patch; |
| } |
| |
| static void draw(JNIEnv* env, SkCanvas* canvas, SkRect& bounds, const SkBitmap* bitmap, |
| Res_png_9patch* chunk, const SkPaint* paint, jint destDensity, jint srcDensity) { |
| if (destDensity == srcDensity || destDensity == 0 || srcDensity == 0) { |
| ALOGV("Drawing unscaled 9-patch: (%g,%g)-(%g,%g)", |
| SkScalarToFloat(bounds.fLeft), SkScalarToFloat(bounds.fTop), |
| SkScalarToFloat(bounds.fRight), SkScalarToFloat(bounds.fBottom)); |
| NinePatch_Draw(canvas, bounds, *bitmap, *chunk, paint, NULL); |
| } else { |
| canvas->save(); |
| |
| SkScalar scale = SkFloatToScalar(destDensity / (float)srcDensity); |
| canvas->translate(bounds.fLeft, bounds.fTop); |
| canvas->scale(scale, scale); |
| |
| bounds.fRight = SkScalarDiv(bounds.fRight-bounds.fLeft, scale); |
| bounds.fBottom = SkScalarDiv(bounds.fBottom-bounds.fTop, scale); |
| bounds.fLeft = bounds.fTop = 0; |
| |
| ALOGV("Drawing scaled 9-patch: (%g,%g)-(%g,%g) srcDensity=%d destDensity=%d", |
| SkScalarToFloat(bounds.fLeft), SkScalarToFloat(bounds.fTop), |
| SkScalarToFloat(bounds.fRight), SkScalarToFloat(bounds.fBottom), |
| srcDensity, destDensity); |
| |
| NinePatch_Draw(canvas, bounds, *bitmap, *chunk, paint, NULL); |
| |
| canvas->restore(); |
| } |
| } |
| |
| static void drawF(JNIEnv* env, jobject, SkCanvas* canvas, jobject boundsRectF, |
| const SkBitmap* bitmap, Res_png_9patch* chunk, const SkPaint* paint, |
| jint destDensity, jint srcDensity) { |
| SkASSERT(canvas); |
| SkASSERT(boundsRectF); |
| SkASSERT(bitmap); |
| SkASSERT(chunk); |
| // paint is optional |
| |
| SkRect bounds; |
| GraphicsJNI::jrectf_to_rect(env, boundsRectF, &bounds); |
| |
| draw(env, canvas, bounds, bitmap, chunk, paint, destDensity, srcDensity); |
| } |
| |
| static void drawI(JNIEnv* env, jobject, SkCanvas* canvas, jobject boundsRect, |
| const SkBitmap* bitmap, Res_png_9patch* chunk, const SkPaint* paint, |
| jint destDensity, jint srcDensity) { |
| SkASSERT(canvas); |
| SkASSERT(boundsRect); |
| SkASSERT(bitmap); |
| SkASSERT(chunk); |
| // paint is optional |
| |
| SkRect bounds; |
| GraphicsJNI::jrect_to_rect(env, boundsRect, &bounds); |
| draw(env, canvas, bounds, bitmap, chunk, paint, destDensity, srcDensity); |
| } |
| |
| static jint getTransparentRegion(JNIEnv* env, jobject, const SkBitmap* bitmap, |
| Res_png_9patch* chunk, jobject boundsRect) { |
| SkASSERT(bitmap); |
| SkASSERT(chunk); |
| SkASSERT(boundsRect); |
| |
| SkRect bounds; |
| GraphicsJNI::jrect_to_rect(env, boundsRect, &bounds); |
| |
| SkRegion* region = NULL; |
| NinePatch_Draw(NULL, bounds, *bitmap, *chunk, NULL, ®ion); |
| |
| return (jint) region; |
| } |
| |
| }; |
| |
| ///////////////////////////////////////////////////////////////////////////////////////// |
| |
| #include <android_runtime/AndroidRuntime.h> |
| |
| static JNINativeMethod gNinePatchMethods[] = { |
| { "isNinePatchChunk", "([B)Z", (void*) SkNinePatchGlue::isNinePatchChunk }, |
| { "validateNinePatchChunk", "(I[B)I", (void*) SkNinePatchGlue::validateNinePatchChunk }, |
| { "nativeFinalize", "(I)V", (void*) SkNinePatchGlue::finalize }, |
| { "nativeDraw", "(ILandroid/graphics/RectF;IIIII)V", (void*) SkNinePatchGlue::drawF }, |
| { "nativeDraw", "(ILandroid/graphics/Rect;IIIII)V", (void*) SkNinePatchGlue::drawI }, |
| { "nativeGetTransparentRegion", "(IILandroid/graphics/Rect;)I", |
| (void*) SkNinePatchGlue::getTransparentRegion } |
| }; |
| |
| int register_android_graphics_NinePatch(JNIEnv* env) { |
| return android::AndroidRuntime::registerNativeMethods(env, |
| "android/graphics/NinePatch", gNinePatchMethods, SK_ARRAY_COUNT(gNinePatchMethods)); |
| } |